December 12, 2020

How does tunnel made?

You are building a road but a mountain is in the way. Could the road be built over the mountain? That would be rough travelling. What […]
December 12, 2020

How does bridge made?

People have been using bridges to cross water for thousands of years. The earliest bridges were tree trunks. A tree growing near the bank was chopped […]
December 12, 2020

What material are bridges made of?

Thanks to bridges, rivers and lakes will not interrupt a journey. People build bridges to make it easier to cross rough land or water. There are […]
December 12, 2020

How do tall buildings stay up?

Tall trees in the forest sway in the wind. So do tall skyscrapers in the city but you just don’t notice it as much. So how […]